From 8556d86b334dbfdbd078b734d0711431463a4f04 Mon Sep 17 00:00:00 2001
From: haoyu <164346864@qq.com>
Date: Sun, 22 Oct 2023 13:07:09 +0800
Subject: [PATCH] fix use after free

---
 lib/pure/nativesockets.nim | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/pure/nativesockets.nim b/lib/pure/nativesockets.nim
index e1784491b6200..593bd2d56f397 100644
--- a/lib/pure/nativesockets.nim
+++ b/lib/pure/nativesockets.nim
@@ -392,6 +392,8 @@ when not useNimNetLite:
       myAddr: pointer
       addrLen = 0
       family = 0
+    
+    defer: freeAddrInfo(addrInfo)
 
     if addrInfo.ai_addr.sa_family.cint == nativeAfInet:
       family = nativeAfInet
@@ -404,8 +406,6 @@ when not useNimNetLite:
     else:
       raise newException(IOError, "Unknown socket family in `getHostByAddr()`")
 
-    freeAddrInfo(addrInfo)
-
     when useWinVersion:
       var s = winlean.gethostbyaddr(cast[ptr InAddr](myAddr), addrLen.cuint,
                                     cint(family))